Journal articles: 'On-Demand mechanical properties'

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Hippie, Jack. "Invention on Demand." Mechanical Engineering 127, no. 11 (November 1, 2005): 36–37. http://dx.doi.org/10.1115/1.2005-nov-3.

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This article reviews a system that lays down tools for creative problem-solving and product-design. Altshuller identified a number of inventive principles and also discerned patterns of technological evolution. He regarded these ideas as generic principles that could be used not only to solve problems in product design, but also to forecast and plan product and business development. As people have continued to study the patent literature, they do not find much in the way of any new inventive principles, and the ratio of really breakthrough patents continues at less than 5 percent. Theory of Solving Inventive Problems (TRIZ) began to migrate to the West after perestroika, partly because many of its proponents in the Soviet Union were frustrated at not being able to implement their technology in the private sector. Systems and products become more dynamic over time. Systems evolve by the matching and mismatching of components and properties.

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Kozibaevich, Mirzaev Bahodir. "THE EFFECT OF ADDITIVES THAT ACCELERATE SOLIDIFICATION ON THE MAIN PROPERTIES OF FOAM CONCRETE: CHANGES IN PHYSICAL AND MECHANICAL PROPERTIES." International Journal of Advance Scientific Research 02, no. 11 (November 1, 2022): 67–76. http://dx.doi.org/10.37547/ijasr-02-11-10.

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At a time when the demand for heat-insulating materials is increasing every year, the production of composite materials with high efficiency based on local and industrial waste can be one of the solutions to this problem. One type of these materials is foam concrete. Use of energy-efficient construction materials, production of wall coverings and heat-insulating products from them. The article considers the issues of improving the main properties of foam concrete under the influence of additives that accelerate the hardening process of foam concrete produced based on local raw materials. The correlation of porosity with mechanical strength was studied. It has been shown that the strength varies significantly when different materials are compressed in a solid fractional volume.

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Džugan, Jan, Martina Maresova, and Pavel Podany. "Dynamic Mechanical Properties of Sugarcane." Advanced Materials Research 811 (September 2013): 314–18. http://dx.doi.org/10.4028/www.scientific.net/amr.811.314.

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New design of a sugarcane shredder is being performed within a research project. This kind of equipment used to be traditionally designed on the basis experiences up to recent time. With increasing demand for the material economic utilization and reliable service, new material optimized design of shredders is required. In order to be able to perform qualified design and material optimization, service conditions has to be known. The paper is dealing with determination of sugarcane mechanical properties under dynamic loading, as the shredding process is performed at high velocities in the range of several meters per second. The mechanical properties of the sugarcane are going to be subsequently used for calculation of in operation loading on shredder components in the further steps.

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Zhou, Jianwei, Baoying Yu, Yaning Kong, Wen Yang, and Baojun Cheng. "Effect of Limestone Powder on Mechanical Properties of Engineering Cementitious Composites." Journal of Physics: Conference Series 2076, no. 1 (November 1, 2021): 012082. http://dx.doi.org/10.1088/1742-6596/2076/1/012082.

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Abstract The effect of limestone powder replacing fly ash on the mechanical properties of engineering cementitious composites was investigated. The results showed that the water demand of engineering cementitious composites due to partial replacement of fly ash by limestone powder, but the water demand of the system decreased when the replacement ratio reached 100%. The flexural strength of the specimen appears to decrease with increasing age due to incomplete replacement of lime powder. The toughness of the specimen can be significantly improved due to the complete replacement of fly ash by limestone powder.

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Qadr, Hiwa Mohammad, and Ari Maghdid Hamad. "Mechanical Properties of Ferritic Martenstic Steels: A Review." Scientific Bulletin of Valahia University - Materials and Mechanics 17, no. 16 (May 1, 2019): 18–27. http://dx.doi.org/10.2478/bsmm-2019-0003.

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Abstract The word-wide demand for energy is constantly increasing, and therefore ideas around future energy-generation are also on the increase with the aim of meeting this demand. This includes designs for the next generation of nuclear power reactors, such as gas-cooled, liquid-metal-cooled and water-cooled reactors; the goal being to create smarter ways to produce more economical, environmentally-friendly energy. The conditions such reactors would need to meet, present significant design challenges for scientist and engineers, not least around the structural materials and components to use. Depending on the operational conditions, use of elevated- temperature ferritic/martensitic materials such as P91 and P92 steel are favoured by several of the designs for use with out-of-core and in-core applications. The main goal behind this review article is to explain mechanical properties of P91 and P92 steel; these are two types of ferritic/martensitic steels. This reviewer, highlight and discuss the development of ferritic/martenisitc steels for nuclear programmes and to explain the effect of irradiation on mechanical properties of P91 and P92.

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Velkushanova, Konstantina V., Lungi Zuma, and Chris Buckley. "Mechanical properties of faecal sludge." Gates Open Research 3 (October 17, 2019): 1582. http://dx.doi.org/10.12688/gatesopenres.13049.1.

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On-site sanitation facilities contribute to the majority of toilet facilities in developing countries as full waterborne sanitation is not feasible or affordable. The characteristics of faecal sludge vary greatly between different locations and types of onsite sanitation facilities and at the same time their understanding is crucial for improvement of the existing faecal sludge management services. The Pollution Research Group (PRG), within the School of Chemical Engineering in the University of Kwa-Zulu Natal have been focussing on the analysis of faecal sludge from different on-site sanitation, such as urine diversion and dehydration toilets, wet and dry ventilated improved pit latrines at household and community levels and unimproved pit latrines. This study was undertaken between 2012 and 2014 and focussed on the characteristics of faecal sludge obtained from different on-site sanitation facilities in the Durban metro area in South Africa. Sampling methods were developed and applied for different depth levels of the pits for each on-site sanitation facility. The analysis followed the PRG standard operation procedures for properties such as: moisture content, total solids, ash content, pH, chemical oxygen demand, density, nutrient contents and thermal properties.

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Souto, André, Jian Zhang, Alejandro M. Aragón, Krassimir P. Velikov, and Corentin Coulais. "Edible mechanical metamaterials with designed fracture for mouthfeel control." Soft Matter 18, no. 15 (2022): 2910–19. http://dx.doi.org/10.1039/d1sm01761f.

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De Smet, David, and Myriam Vanneste. "Design of Debondable PU Coating for Degradation on Demand." Coatings 14, no. 6 (June 7, 2024): 731. http://dx.doi.org/10.3390/coatings14060731.

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Polyurethane (PU) coatings are applied on technical textiles for their superior properties. Up to now, PU-coated textiles are not recycled at end of life. Landfilling is still the most occurring way of processing PU waste. Next to looking to sustainable routes for processing PU waste, there is the drive towards bio-based polymers. With this regard, a bio-based trigger degradable PU coating specifically designed for textiles was developed. The PU was characterized via FT-IR, TGA, and DSC. The performance of the coating was assessed by examining the mechanical properties and the resistance to hydrostatic pressure initially and after washing. The developed bio-based PU coatings had a high tensile strength, were waterproof, and had excellent wash fastness at 40 °C. The coating could be easily debonded from the textile by immersion in a tetra-n-butylammoniumfluoride solution. FT-IR and microscopic analysis indicated that the coating was completely removed and that the polyester fabric was not degraded.

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Hidayati, Fanny, Sri Sunarti, Teguh Setiaji, and Arif Nirsatmanto. "SIFAT FISIKA DAN MEKANIKA KAYU JABON MERAH (Anthocephalus macrophyllus) YANG DITANAM DI WONOGIRI, 2 JAWA TENGAH." Jurnal Hutan Tropis 8, no. 3 (December 15, 2020): 357. http://dx.doi.org/10.20527/jht.v8i3.9739.

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Red jabon is one of the fast growing species. It is growth well in tropical countries. It has a potential to fulfill the demand of wood. Tree imrovement program of this species has been done in Indonesia. However, information of wood properties related to tree improvement program of red jabon is limited. Therefore, wood properties such as physical and mechanical properties of this species at the progeny trial were needed to clarify. The aims of this research were to clarify the variation of physical and mechanical properties of red jabon from 5 families at5-year-old planted in Wonogiri, Central Java and relationship between air-dry density and mechanical properties. As the result, physical and mechanical properties were varied among 5 families. Based on the results, famili number 85 performed good result of physical and mechanical characteristics, eventhough the physical properties were not highest among 5 families but it was abouf the average value. Furthermore, this family showed the best values of all mechanichal characteristics tested. In addition, air-dry density has highly positive significantcorrelation with mechanical properties (static bending strength and compressive strength parallel to grain), suggesting that mechanical properties can be predicted by air-dried density.

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Ramadji, Christian, Adamah Messan, and Elodie Prud’Homme. "Influence of Granite Powder on Physico-Mechanical and Durability Properties of Mortar." Materials 13, no. 23 (November 27, 2020): 5406. http://dx.doi.org/10.3390/ma13235406.

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This study explored the pozzolanic reactivity of granite powder (GP) and its influence on the microstructure of cement paste. An analysis of the physical properties (water demand, setting time, heat of hydration and total shrinkage), compressive strength and durability indicators (water absorption, porosity, acid attack and chloride ions diffusion) was carried out on mortar containing 10%, 15% and 20% of GP as partial substitution to cement (CEM I 42.5 R) in the short and long term. The results showed that the GP does not exhibit pozzolanic reactivity and that it reduces the heat of hydration. Water demand and setting time were not affected by the GP. The compressive strength decreases with increasing the content of GP; but in the long term, the compressive strength was not affected for 10% GP substitution. The presence of granite powder in mortar induces an increase in porosity, which led to an increase in the diffusion properties of fluids (capillary water absorption and chloride ions diffusion).

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Wang, Wei Min. "Analysis on Mechanical Properties of Tunnel Lining on Fire." Advanced Materials Research 243-249 (May 2011): 3432–39. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.3432.

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The paper analyzes the fire-resistant performance of big tunnel structure by setting up the analyzing model of tunnel-surrounding, choosing the characteristics of concrete, according to the lengthways and crosswise temperature distribution in specific scene of fire, analyzing the temperature and stress field of the tunnel structure, and knowing the basic rules and the damage of the lining and inner equipment of the tunnel by high temperature which is set on the Shanghai Yangtze tunnel. Tunnel lining is made up of reinforced concrete duct pieces. Concrete is a kind of non-homogeneous composite material, which would experience complex changing both physically and chemically by the high temperature, and the changing will surely lead to the descent of the carrying capability of the integral mechanical properties. The thesis studies the basic rules of the tunnel on fire and the damage of the tunnel lining structure and the inner equipments by the high temperature, which is set in the Yangtze River Tunnel in Shanghai, thus contributes to analyze the demand of the joint action of the disaster prevention, the ventilation system and other equipment and to reduce the fire loss.

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Baruwa, Akinsanya D., Elizabeth M. Makhatha, and Esther T. Akinlabi. "Surface Response to Mechanics of Hardness and Wear Characteristics of Nanoscale Hydrophobic Film." MATEC Web of Conferences 347 (2021): 00017. http://dx.doi.org/10.1051/matecconf/202134700017.

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There is an increase in demand for durable and efficient organic nanoscale coatings for modern manufacturing systems and/or components for various applications. In wake of this demand, a new superhydrophobic silane compound was deposited on mild steel, stainless steel and titanium substrates which were pre-treated with alumina via the atomic layer deposition (ALD) method. Three substrates were considered for evolving properties comparison, also, determination of the influence of substrates’ response to films mechanical properties. The mechanical properties and the failure mechanics were investigated through nanoindentation and nanoscratch while the morphologies were examined through a field emission scanning electron microscope. The morphological evolution and mechanical viability indicated that stainless steel showed the most robust properties when compared with other substrates. Therefore, a nanoscale coating’s mechanical strength can be influenced by the substrate’s material compositions.

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Cooperstein, Ido, S. R. K. Chaitanya Indukuri, Alisa Bouketov, Uriel Levy, and Shlomo Magdassi. "3D Printing of Micrometer‐Sized Transparent Ceramics with On‐Demand Optical‐Gain Properties." Advanced Materials 32, no. 28 (May 17, 2020): 2001675. http://dx.doi.org/10.1002/adma.202001675.

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Che, Yunjiao, Jens Gaitzsch, Nikolai Liubimtsev, Stefan Zschoche, Tim Bauer, Dietmar Appelhans, and Brigitte Voit. "Double cross-linked supramolecular hydrogels with tunable properties based on host–guest interactions." Soft Matter 16, no. 29 (2020): 6733–42. http://dx.doi.org/10.1039/d0sm00833h.

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We report a novel double cross-linked hydrogel system based on polyacrylamide and poly(2-methyl-2-oxazoline) (PMOXA) network chains, as well as on supramolecular host–guest interactions with on-demand tailored mechanical properties.

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Hwang, Seok Joon, Jiwon Ryu, and Phillip Lee. "Trends in Mechanical Metamaterial Research Based on Kirigami and Origami for Functional Structure Implementation." Journal of Flexible and Printed Electronics 2, no. 2 (December 2023): 187–98. http://dx.doi.org/10.56767/jfpe.2023.2.2.187.

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With the rapid advancements in industry science and technology, mechanical structures must respond to applications across diverse fields and scales. However, traditional mechanical equipment faces challenges in sectors that demand very small scales or intricate material properties, especially concerning component assembly and precision. Mechanical metamaterials based on Kirigami and Origami present a potential solution by enabling specific functionalities and properties directly within the structure itself. This review article provides an overview of this technology and highlights the trends in its applied research.

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Dhawan, Vikas, Sehijpal Singh, and Inderdeep Singh. "Effect of Natural Fillers on Mechanical Properties of GFRP Composites." Journal of Composites 2013 (July 8, 2013): 1–8. http://dx.doi.org/10.1155/2013/792620.

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Fiber reinforced plastics (FRPs) have replaced conventional engineering materials in many areas, especially in the field of automobiles and household applications. With the increasing demand, various modifications are being incorporated in the conventional FRPs for specific applications in order to reduce costs and achieve the quality standards. The present research endeavor is an attempt to study the effect of natural fillers on the mechanical characteristics of FRPs. Rice husk, wheat husk, and coconut coir have been used as natural fillers in glass fiber reinforced plastics (GFRPs). In order to study the effect of matrix on the properties of GFRPs, polyester and epoxy resins have been used. It has been found that natural fillers provide better results in polyester-based composites. Amongst the natural fillers, in general, the composites with coconut coir have better mechanical properties as compared to the other fillers in glass/epoxy composites.

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Kwon, Han Sang, Marc Leparoux, Kwang Il Hwang, Jun Ho Choi, and Kwon Hoo Kim. "Mechanical Performance of Carbon Nanotube-Reinforced Nanocomposites." Advanced Materials Research 1110 (June 2015): 60–64. http://dx.doi.org/10.4028/www.scientific.net/amr.1110.60.

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There is a continuous demand for next-generation industrial materials because they offer advantages such as high performance, reliable life cycle, reasonable cost, and ease of mass production. Carbon nanotubes (CNTs), which possess unique properties such as beneficial mechanical, electrical, and thermal properties, as well as chemical stability, have received considerable attention as candidates for reinforcing ultra-high-performance nanocomposites. CNT-reinforced Al alloy matrix nanocomposites were fabricated by mechanical ball-milling and hot-pressing processes. The effects of different CNTs on the mechanical properties of the composites were investigated. The mechanical properties were found to change significantly depending on the type of CNT blended with the matrices. The mechanical performance of the nanocomposites can thus be controlled by using different types of CNT reinforcements.

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Šajn Gorjanc, Dunja, and Klara Kostajnšek. "Permeable Properties of Hygienic Nonwovens Bonded Using Mechanical, Chemical, and Thermal Techniques." Polymers 16, no. 8 (April 17, 2024): 1132. http://dx.doi.org/10.3390/polym16081132.

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The demand for hygienic nonwovens has increased, especially since 2020. As expected, the market for nonwovens showed an increase during the COVID-19 outbreak, especially in the medical and hygienic nonwovens sector. The aim of this study is to analyse the influence of the permeability properties of hygienic nonwovens that have been mechanically, chemically, and thermally bonded. Hygienic nonwovens are lightweight (from 20 to 120 g/m2), produced by carding (roller carding), and are bonded using three different bonding processes (mechanical, thermal, and chemical). Hygienic nonwovens are intended for protective clothing in hospitals. For the experimental part, the seven different nonwovens used for hygienic purposes were produced using the dry laying process. The samples were produced in Tosama, a factory for sanitary supplies. The research results show that the nonwoven bonding processes have a significant influence on the structural, mechanical, and permeability properties.

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Yang, Guanghui, Xuejuan Wan, Zhipeng Gu, Xierong Zeng, and Jiaoning Tang. "Near infrared photothermal-responsive poly(vinyl alcohol)/black phosphorus composite hydrogels with excellent on-demand drug release capacity." Journal of Materials Chemistry B 6, no. 11 (2018): 1622–32. http://dx.doi.org/10.1039/c7tb03090h.

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Bajor, Teresa, Marlena Krakowiak, and Dariusz Rydz. "Effect of Thermo-Mechanical Treatment on Mechanical Properties of AlCuMg Alloys." Solid State Phenomena 199 (March 2013): 407–11. http://dx.doi.org/10.4028/www.scientific.net/ssp.199.407.

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Technology development and new grades of alloys creation put before construction materials the number of requirements in range of durability and reliability of created constructions. Receivers expect materials with high strength properties, low production cost of the finished product, availability, corrosion resistance and low specific gravity. So the specific needs of customers mean that studies are constantly associated with the exploration of new materials and technologies that could meet made requirements [1,2,. In large scale this demand is met through the use of non-ferrous metals and their alloys. Selection of appropriate manufacturing techniques and the use of heat treatment procedures allow to obtain materials with better mechanical properties. Here the leading role has the aluminium and its alloys. Due to specific mechanical properties aluminium based materials are used in almost each field of industry. In aircraft industry they are used for the manufacture of fuselage elements in automobile industry the light alloys are used to make cylinder blocks, and other elements of internal combustion engines. In the construction industry they are used to manufacture windows and doors, as well as beautiful self-supporting lightweight facades. While the aluminium alloy products such as films or cans are also used in the food industry. The combination of physico-chemical and mechanical properties of aluminium alloys makes them the optimal solution for innovative design, thanks to them engineers can provide high strength associated with very low gravity. This allows to minimize the costs of subsequent use of the product, and while achieving good strength parameters. As part of this work the analysis of strain rate and temperature impact on mechanical properties of the tested alloy will be carried out. The experimental studies conducted in the temperature range of recrystallization (test temperature: 400°C, 450°C, 480°C, 500°C) using two strain rates 1 s-1 and 0,1 s-1. This paper present the analysis of the application of high-temperature deformation changes in structure mainly caused by the dynamic recrystallization processes, which determine the optimal parameters of AlCuMg deformation process [. The proposed methodology of the research work made it possible to determine the effect of temperature-velocity parameters to changes in mechanical properties (inter alia: microhardness measurements) and changes in the structure of the material, which are closely related to the level achieved in mechanical properties.

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Nampitch, Tarinee. "Adsorption of Organic Substances on Modified Montmorillonite, Cloisite 10A, 15A, 20A, 25A, and 30B." Advanced Materials Research 787 (September 2013): 118–21. http://dx.doi.org/10.4028/www.scientific.net/amr.787.118.

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Clay modified with organic surfactant, Cloisite 10A, 15A, 20A, 25A, and 30B act as effective adsorbent in organic wastewater applications. The experiment was tested using wastewaters from removal of skim NR from concentrated NR industry. The ability to remove organic contaminants from aqueous solution, based on different molecular structures of organically modified clays, was evaluated using UV/VIS spectroscopy, chemical oxygen demand (COD), biological oxygen demand (BOD), suspended solid (SS), total dissolved solid (TDS), total solid (TS) and total kjeldahl nitrogen (TKN). In addition the mechanical properties of nanocomposites product obtained from coagulating method were determined by tensile testing. It reveals that mechanical properties of nanocomposites were improved when compared to the original skim rubber. The thermal stability and the composition of the coagulated skim rubber-organoclay nanocomposites were determined by thermogravimetric analysis.

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Barbuta, Marinela, Alexandru Timu, Liliana Bejan, and Roxana Dana Bucur. "Mechanical Properties of Fly Ash Polymer Concrete with Different Fibers." Materiale Plastice 55, no. 3 (September 30, 2018): 405–9. http://dx.doi.org/10.37358/mp.18.3.5038.

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The experimental results obtained by studying the influence of different types of fibers on the mechanical properties of fly ash polymer concrete are presented in the paper. The general demand of using wastes found applicability in building material industry because some of them are beneficial in improving concrete properties. The waste additions type fly ash and fibers were incorporated in polymer concrete. The study focused on fibers type glass, polyester, metallic and cellulose. The mechanical properties such as compressive strength, flexural strength and split tensile strength were investigated having in view the type, dosage and length of fibers. The results show that fibers improved mechanical properties in comparison with that of polymer concrete without fibers, the test results being differently influenced by the factors which were considered.

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Zýka, Jiří, Irena Andršová, Božena Podhorná, and Karel Hrbáček. "Mechanical Properties and Microstructure of IN738LC Nickel Superalloy Castings." Materials Science Forum 782 (April 2014): 437–40. http://dx.doi.org/10.4028/www.scientific.net/msf.782.437.

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IN738LC is a cast nickel-base superalloy developed for applications requiring high strength at elevated temperatures. Its balanced composition provides a good combination of tensile and creep-rupture properties as a result of gamma prime precipitate strengthening enhanced by solid solution and grain-boundary strengthening. Experimental castings are used in heat treated state. This alloy is used widely, for example, for manufacturing of gas turbine blades. Recently, customers demand different weight of castings hence different conditions during solidifying and cooling of the castings originate, resulting in different castings microstructure. When approving the castings, mechanical values are measured by tensile test on test bars made from the cast blade roots. This work investigates mechanical properties casting structure correlations, particularly grain, casting defects, carbides.

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Chen, Zhuoyuan, Aizhong Qin, Peiyang Li, Zhihua Gao, Jianbo Zhao, and Xiaoyong Liu. "Ship Matrix-Deck and Analysis of Its Mechanical Properties." Journal of Physics: Conference Series 2361, no. 1 (October 1, 2022): 012013. http://dx.doi.org/10.1088/1742-6596/2361/1/012013.

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Ship deck is generally made of steel materials. With the development of ship technology and the demand of ship lightweight design, a lightweight and modular ship deck is needed. In this paper, a ship deck is designed based on the form of matrix; The deck is mainly made of engineering plastics and filled with load-bearing materials. The overall strength of the material is analyzed by FEM simulation. According to the simulation results, the compressive strength of this grid composite structure is basically equivalent to that of C30 concrete, but the weight can be reduced by 30% compared with C30 concrete The matrix-deck has the characteristics of high strength and low density, and is suitable for occasions with high requirements for material strength and material quality.

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Aqeel, A. B., M. Mohasan, Pengyu Lv, Yantao Yang, and Huiling Duan. "Effects of nozzle and fluid properties on the drop formation dynamics in a drop-on-demand inkjet printing." Applied Mathematics and Mechanics 40, no. 9 (July 16, 2019): 1239–54. http://dx.doi.org/10.1007/s10483-019-2514-7.

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Uyup, Mohd Khairun Anwar, Jinfeng Zhang, Xian Feng, Zhonghua Chen, Zhengtao Li, and Nordahlia Abdullah Siam. "Effect of tree age on the properties of Himalayan birch (Betula alnoides Buch.-H.ex D.Don) wood." BioResources 18, no. 4 (October 9, 2023): 8007–19. http://dx.doi.org/10.15376/biores.18.4.8007-8019.

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The purpose of this study was to determine the effect of four different age groups on wood properties, i.e., anatomical, physical, and mechanical, of Himalayan birch (Betula alnoides Buch.-H.ex D.Don). The correlation between the properties was also discussed. The results indicated age influences the anatomical, physical, and mechanical properties of Himalayan birch. Results were comparable with other plantation species. Moreover, mechanical properties were highly correlated with the fibre morphology in Himalayan birch. Results from this present study indicate that the 15-, 20-, and 25-year-old Himalayan birch are suitable to be used for parquet, furniture, and other products. Generally, plantation-grown Himalayan birch has the potential to be a raw material to fulfill the demand for the timber industry.

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Balea, A., E. Fuente, Q. Tarrés, M. Àngels Pèlach, P. Mutjé, M. Delgado-Aguilar, A. Blanco, and C. Negro. "Influence of pretreatment and mechanical nanofibrillation energy on properties of nanofibers from Aspen cellulose." Cellulose 28, no. 14 (August 5, 2021): 9187–206. http://dx.doi.org/10.1007/s10570-021-04109-w.

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AbstractThe characteristics of cellulose nanofibers (CNFs) depend on many factors such as the raw material, type and intensity of the pre-treatment, and type and severity of the mechanical defibrillation process. The relationship among factors is complex but crucial in determining the final, fit-for-use CNF properties. This study aims to find the relationship between the CNF properties morphology, aspect ratio, nanofibrillation yield, transmittance and cationic demand, and the production process using bleached Aspen thermomechanical pulp as the raw material. Five different types of pretreatments were carried out and five different defibrillation intensities of high-pressure homogenization were evaluated. Pretreatments were: PFI refining at 20,000 revolutions, enzymatic hydrolysis with 80 and 240 g of enzyme per ton of dry pulp and TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl)–mediated oxidation with 5 and 15 mmol of NaClO per gram of dry pulp. From the twenty-five different procedures evaluated, results show that both the pretreatment and the severity of the high-pressure homogenization determined both the fibrillation yield and the CNF morphology. Moreover, the main properties of CNFs (cationic demand, yield, transmittance and aspect ratio) can be estimated from the carboxylic content of the pretreated pulp, which would facilitate the control of the CNF production and their tuning according to the production needs.

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Kumar, R. Jagadresh, P. Kameswara Rao, S. Roopa, and M. Gangadhar Rao. "Investigation of Mechanical Properties of Natural Fiber Reinforced With Screw Pine and Jute Composite." International Journal for Research in Applied Science and Engineering Technology 11, no. 4 (April 30, 2023): 1204–14. http://dx.doi.org/10.22214/ijraset.2023.50264.

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Abstract: Natural fiber reinforced composites gaining the demand in the engineering applications. Natural Fiber Reinforced Polymer Composites replaces the conventional material because it possesses mechanical, chemical, thermal properties comparable and higher than conventional material. Light weight, low cost and biodegradability increases the demand of NFRPC. The objective of this work is to prepare the composite fiber composite specimens as per ASTM Standard using hand layup method and conduct the tensile Test, impact Test (Charpy) and hardness Test (Rockwell). The testes carried out on Glass Fiber + Jute Fiber Composite, Glass Fiber + Jute Fiber + Screw Pine Fiber and Glass Fiber + Screw Pine Fiber composite. The comparative result is observed to know the optimized composite fiber

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Guryeva, Viktoriya, Alexander Doroshin, and Yuliya Andreeva. "Building ceramics based on composition of low-quality clay and slurry." MATEC Web of Conferences 143 (2018): 02014. http://dx.doi.org/10.1051/matecconf/201814302014.

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At present, there is a trend towards increasing demand for ceramic products with enhanced physical and mechanical properties. This study is aimed at developing scientifically grounded compositions of ceramic products that maximize the use of local low-quality aluminosilicate raw materials and secondary raw materials in brick-making technology. Characteristics of local low-melting clays and industrial waste in the form of drilling slurry with minimum percentage of petroleum product were studied and presented in this paper. Standard methods for determining physical and mechanical properties of bricks, physicochemical and statistical methods of research are used as a methodological framework. The paper shows effects of drilling slurry with an increased content of calcium oxide on the composition, physical and mechanical properties of wall ceramics, as well as effects of composition of low-quality local clays and slurries on the structure and properties of ceramic materials. The modifying role of container glass and its effects on properties of a synthesized ceramic piece were studied and presented.

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Lidmila, Martin, Jaroslav Topič, Tomáš Plachy, Zdeněk Prošek, Václav Nežerka, and Pavel Tesárek. "Mechanical Properties of Recycled Binder/Micro-Filler Cement-Based Material." Advanced Materials Research 1054 (October 2014): 234–37. http://dx.doi.org/10.4028/www.scientific.net/amr.1054.234.

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The presented study addresses the mechanical performance of micro-filler cement-based material produced from recycled concrete sleepers. Such material can be considered both, as a binder and filler at the same time. The main advantage of such material is the energy efficiency of the production process, since there is no demand for increased temperature. Compression and flexural strength parameters of such material are compared with those of a composite based on commonly used Portland cement. Moreover, the influence of curing conditions on the strength parameters was investigated as well. The results indicate that the recycled sleepers can be used in the form of micro-filler cement-based to replace a certain portion of cement in concrete and reduce cost of concrete structures.

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Luo, Qing, Xin Ping Li, Ye Liu, and Jun Hua Liu. "Effect of Xylanase Modification on Pulp and Paper Properties of Masson Pine Mechanical Pulp." Advanced Materials Research 396-398 (November 2011): 1375–78. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.1375.

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In this paper, the effects of xylanase modification on pulp and paper properties of masson pine mechanical pulp were investigated. After the modification, the Zeta potential of pulp and the cationic demand of whitewater increased，the drainage property of the pulp increased obviously. At the same time, the amount of shives decreased, it showed that using bio-enzyme could improve the utilization rate of raw materials as well as reduces the energy consumption of the mechanical pulp. On the other hand, xylanase modification had great effect on the dynamic contact angle, with the dosage of xylanase increased, the contact angle of the pulp first increased and then reduced.

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Modi, Mahima, and Dr Madan Chandra Maurya. "Study of Mechanical Properties of Concrete using Recycled Aggregates." International Journal for Research in Applied Science and Engineering Technology 12, no. 2 (February 29, 2024): 716–22. http://dx.doi.org/10.22214/ijraset.2024.58422.

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Abstract: The last few decades have seen a rapid increase in urbanisation, which has increased demand for building materials, particularly aggregates. The aggregate mining has put a burden on the environment and raised concerns about swift ecological harm. Lack of building aggregates is a severe issue that requires the use of alternative recycled aggregates in its stead. Old, abandoned building debris is used to create recycled aggregates (RA), which are then hauled to a landfill and disposed of there. In addition to pushing waste sites farther away, the decades-long urbanisation of the region has also increased the expense of moving these aggregates. Utilising them in place of natural aggregates in concrete mixtures is the solution. Here in this study some proportion of natural coarse aggregate is being replaced by the recycled aggregate and analysis of its effect on various mechanical properties of concrete is being done. The mechanical properties of concrete constitute Compressive Strength, Flexural Strength, Shrinkage, Creep and Modulus of Elasticity.

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Omar, N. W. Y., N. A. Shuaib, A. I. Azmi, and M. H. J. A. Hadi. "Effect of Build Parameters on Process Energy Consumption and Material Usage in Fused Deposition Modelling Method." Journal of Physics: Conference Series 2312, no. 1 (August 1, 2022): 012015. http://dx.doi.org/10.1088/1742-6596/2312/1/012015.

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Abstract Fused deposition modelling (FDM) process is one of popular 3D printing technologies, especially on printing polymer materials for a rapid prototyping. The process is well known for its resource saving, with no tooling cost required and minimum energy demand. However, the challenge is that the process performances are highly influenced by selection of parameters. From literature, consideration on material usage and process energy demand in FDM processes is still limited. This study used an L9 Taguchi orthogonal array design in investigating effect of build orientation, printing speed and layer thickness on process energy consumption and total material usage in FDM processes. The p-values from ANOVA analysis revealed that only layer thickness and build orientation had significant effect on the outputs. In minimising material usage, the strategy is to select the correct build orientation to avoid need of support structure. For reducing energy demand, optimum layer thickness needs to be determined by considering other factors such as mechanical properties and surface roughness. This study provides preliminary findings which will benefit FDM users in using resources efficiently. Further studies are required to complement the findings from the aspects of mechanical and physical properties of the printed products.

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Morano, Chiara, Marco Alfano, and Leonardo Pagnotta. "Effect of Strain Rates and Heat Exposure on Polyamide (PA12) Processed via Selective Laser Sintering." Materials 16, no. 13 (June 28, 2023): 4654. http://dx.doi.org/10.3390/ma16134654.

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The use of polymers in the transportation industry represents a great opportunity to meet the growing demand for lightweight structures and to reduce polluting emissions. In this context, additive manufacturing represents a very effective fabrication route for mechanical components with sophisticated geometry that cannot be pursued by conventional methods. However, understanding the mechanical properties of 3D-printed polymers plays a crucial role in the performance and durability of polymer-based products. Polyamide is a commonly used material in 3D printing because of its excellent mechanical properties. However, the layer-by-layer deposition process and ensuing auxiliary steps (e.g., post-processing heating) may affect the microstructure and mechanical properties of 3D-printed nylon with respect to the bulk counterpart. In this work, we explore the effect of displacement rate and heat exposure on the mechanical properties of 3D-printed polyamide (PA12) specimens obtained by selective laser sintering (SLS). Moreover, the thermal characteristics of the powders and sintered material were evaluated using differential scanning calorimetry (DSC). Our results highlight the expected rate dependency of mechanical properties and show that a post-processing heat treatment partly affects mechanical behavior.

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A. Hamed, Haneen, and Zinah W. Abass. "EFFECT OF STEEL FIBER PROPORTION ON SIFCON MECHANICAL PROPERTIES." Journal of Engineering and Sustainable Development 26, no. 1 (January 3, 2022): 55–63. http://dx.doi.org/10.31272/jeasd.26.1.6.

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Slurry Infiltrated Fiber Concrete (SIFCON) is a relatively new high-performance material that may be thought of as a high-fiber content version of fiber reinforced concrete. This matrix is comprised of flowing mortar that must penetrate the fiber network implanted in the molds sufficiently. SIFCON combines excellent mechanical properties with a high ductility and toughness grade. SIFCON is utilized in applications that demand a high degree of ductility and energy absorption, most notably seismic-resistant reinforced concrete structures and structures exposed to abnormal or explosive loads. Additionally, pavement overlays, prestressed beam repair, and structural reinforced concrete element restoration have all been effective. The main aim of this study is to determine the effect of hooked-end steel fiber and micro-steel fiber on the strength of SIFCON specimens exposed to flexural and splitting loading. Three volume fractions of steel fiber (8,10, and12) % were used in this investigation. By weight of cement in SIFCON slurry, the proportion of Silica Fume SF substitution was 10%. Flexural strength was determined by testing specimens of (100×100×500) mm, and splitting tensile strength was determined at 7 and 28 days using cylindrical specimens with dimensions (150mm × 300m).. The results obtained from these tests were compared with SIFCON containing micro steel fiber. The test results show superior characteristics of SIFCON containing hooked-end steel fiber, as compared with micro steel fiber. For example, the flexural strength and splitting strength are 24.89 MPa and 10.14 MPa, respectively for SIFCON with 8% hooked-end steel fiber and 17.51 MPa and 9.1 MPa for control specimens with micro steel fiber.

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Hadinata, Muhammad Effsal, and Paweł Kozakiewicz. "An investigation of selected properties of teak wood from 9-year-old plantation forest in Indonesia." Annals of WULS, Forestry and Wood Technology 110 (June 30, 2020): 61–72. http://dx.doi.org/10.5604/01.3001.0014.3929.

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An investigation of selected properties of teak wood from 9-year-old plantation in Indonesia. Teak (Tectona grandis L.f) listed in standard EN 13556:2003 (code TEGR) is known as the most popular species in tropical countries, especially in Indonesia. It has not only good qualities in physical properties and mechanical properties, but it also has an aesthetics pattern. The best teak wood is usually more than 80 years old. It is too long a period of time and cannot fulfil the current wood demand. To fulfil the increasing demand, researchers in Indonesia have developed short rotation teak wood. However, the quality of this wood is rather low. The objectives of this study were to obtain complete information about mechanical, physical and acoustic properties of 9-year-old teak wood, to compare its properties with conventional teak wood and to evaluate the optimal utilization of 9 years-old teak wood based on its properties.

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Kruszelnicka, Weronika, Andrzej Marczuk, Robert Kasner, Patrycja Bałdowska-Witos, Katarzyna Piotrowska, Józef Flizikowski, and Andrzej Tomporowski. "Mechanical and Processing Properties of Rice Grains." Sustainability 12, no. 2 (January 11, 2020): 552. http://dx.doi.org/10.3390/su12020552.

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Strength properties of grains have a significant impact on the energy demand of grinding mills. This paper presents the results of tests of strength and energy needed the for destruction of rice grains. The research aim was to experimentally determine mechanical and processing properties of the rice grains. The research problem was formulated in the form of questions: (1) what force and energy are needed to induce a rupture of rice grain of the Oryza sativa L. of long-grain variety? (2) what is the relationship between grain size and strength parameters and the energy of grinding rice grain of the species Oryza sativa L. long-grain variety? In order to find the answer to the problems posed, a static compression test of rice grains was done. The results indicate that the average forces needed to crush rice grain are 174.99 kg m·s−2, and the average energy is 28.03 mJ. There was no statistically significant relationship between the grain volume calculated based on the volumetric mass density Vρ and the crushing energy, nor between the volume Vρ and other strength properties of rice grains. In the case of Vs, a low negative correlation between strength σmin and a low positive correlation between the power inducing the first crack were found for the grain size related volume. A low negative correlation between the grain thickness a3, stresses σmin and work WFmax was found as well as a low positive correlation between thickness a3 and the force inducing the first crack Fmin.

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Zhang, X. N., and Peng Cao. "Effect of Heat Treatment on Microstructure and Mechanical Properties of a Ti-Mo-Zr Alloy." Advanced Materials Research 275 (July 2011): 155–58. http://dx.doi.org/10.4028/www.scientific.net/amr.275.155.

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Recently there is increasing demand for the development of new -type titanium with a low elastic modulus for surgical orthopaedic implant applications. In this paper, we developed a new Ti-Mo-Zr alloy based on the d-electron alloy design theory. The designed Ti-12Mo-5Zr (at%) alloy was then produced using ingot metallurgy and evaluated pertaining to the effect of heat treatment on the microstructure and mechanical properties. The alloy exhibited a relatively low Young’s modulus similar to some typical  orthopaedic titanium alloys. Yield strength, tensile strength and Young’s modulus of the alloy decreased after solid solution treatment. The mechanism by which heat treatment affects the mechanical properties is discussed.

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Han, Yu Min, Xiao Xing Shi, Li Wang, and Dao Ming Zhang. "Research on the Capability of Basal Layer Stabilized Gravel by Cement and Fly-Ash." Applied Mechanics and Materials 204-208 (October 2012): 3765–70. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.3765.

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Aiming at the basal layer demand on pavement performance in Tu – Wu Highway of Baicheng diversion road, based on the theory of gradution in mixture, experimental studies have been done in grade of gravel and road performance of stabilized gravel by cement and fly-ash. The right amount of cement and fly-ash in mixture can improve spatial structural components of mixture and its mechanical properties. Base on these measured datas, the mixture of cement and fly-ash mixed in the gravel is reasonable and feasible，and the results show its mechanical properties rely on mix proportion of the basal layer.

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Desta, Tariku, Devendra Kumar Sinha, and Perumalla Janaki Ramulu. "Mechanical Behavior and Wear Characteristics of a Conform Extruded C18150 (Cu-Cr-Zr Alloy) Rod." Journal of Engineering 2023 (September 27, 2023): 1–10. http://dx.doi.org/10.1155/2023/8487824.

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The demand level of Cu-Cr base alloys is on the top notch from miniature parts to large parts based on their mechanical, metallurgical, chemical, and electrical properties. Due to these, the processing of Cu-Cr-Zr alloys for the betterment of those properties has been a prospect for researchers. Commonly, Cu-Cr alloys are manufactured through the conventional extrusion process at the industrial level. However, conventional extrusion processes have some limitations, specifically regarding grain size refinement and accompanying strength. To avoid such a problem, the conform extrusion process is inculcated for the Cu and Al alloys extrusion. In the present study, C18150 copper rods were extruded from the feed stock rod of 12.5 mm to 10 and 8 mm in diameter through the conform extrusion process; however, no posttreatment and artificial aging have been made to the extrudates. The extrudates of C18150 rods were tested mechanically and microstructurally. Significant mechanical properties improvement has been observed as the diameter decreased to a certain dimension. Same phenomenon is also observed in the microstructural and hardness case. Wear test results also followed the similarity with that of mechanical properties.

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Kamatchi, Hariharan, Arul Anderson, and Kannan Suresh. "Study on mechanical properties of Inconel 625 and Incoloy 800H with nitrate based molten salts." Zastita materijala 63, no. 4 (2022): 477–83. http://dx.doi.org/10.5937/zasmat2204477h.

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Energy storage is the most indispensable technology in the recent days with augmented power demand, which helps in balancing the energy demand and production time. Among the broad spread of energy storage types, molten salts technology in concentrated solar plants is most economical, highly efficient with excellent duration on the storage timings. In this current effort, Inconel 625 and Incoloy 800H nickel based super alloys have been taken and heated with sodium nitrate and potassium nitrate molten salts. The super alloy substrates were coated with Yttria stabilized zirconia as thermal barrier coating which could enhances the heat resistance and corrosion resistance property of the base substrates. Both layered and non-coated super alloy samples were intense to a fairly accurate temperature of 1000 o C for different duration as 9, 12 and 15 hours. The mechanical properties of both unheated and heated specimens were compared with the results obtained from tensile test, compression test, hardness test, and impact test. The changes in the micro-structural properties were investigated with the support of SEM images and by XRD analysis. The mechanical properties of YSZ coated specimens are found to be better than the uncoated specimens; which increases the sustainability of the super alloys with the molten salts.

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Zainudin, Syairah, Norshah Aizat Shuaib, Nur’ain Wahidah Ya Omar, and Azwan Iskandar Azmi. "Using taguchi approach for investigating mechanical properties of recycled carbon fibre reinforced thermoplastics for injection moulding applications." International Journal of Modern Manufacturing Technologies 13, no. 2 (December 20, 2021): 149–54. http://dx.doi.org/10.54684/ijmmt.2021.13.2.149.

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Demand for carbon fibre reinforced plastic (CFRP) increases due to its popular demand in sectors such as automotive and aerospace. This leads to high volume of manufacturing and end of life CFRP waste. The challenge is to recycle the heterogenous waste and utilise the recycled carbon fibre (rCF) in potential applications, including the injection moulding process. However, the effect of processing parameters such as type of new thermoplastics, filler weight loading and particle size on product mechanical properties is not well understood. This study carried out experimental trials based on L4 Taguchi orthogonal design. It is found that the mechanical and physical properties significantly depend on the selected parameters. Optimisation of the parameters should depend on final application of the product. This study highlights potential use of rCF in reinforcing pure thermoplastics, as well as an alternative material to virgin carbon fibre (CF).

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Sala, Conrad M., Eduardo Robles, Aneta Gumowska, Anita Wronka, and Grzegorz Kowaluk. "Influence of moisture content on the mechanical properties of selected wood-based composites." BioResources 15, no. 3 (May 29, 2020): 5503–13. http://dx.doi.org/10.15376/biores.15.3.5503-5513.

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Wood quality depends on many circumstances, as it is sensitive to changing properties, depending on the environment. This work evaluates the influence of moisture content of selected wood-based composites on their basic mechanical properties, i.e., modulus of rupture and modulus of elasticity. The selected panels were divided by application in construction materials and furniture materials, which demand specific conditions during service-life. The increase of moisture content in different types of wood-based panels resulted in a slight reduction of the modulus of rupture and the modulus of elasticity. Boards for use in dry conditions, mainly in the furniture industry, were more sensitive to lowering their modulus of elasticity with higher board moisture content compared with those designed for humid conditions, mainly from the building industry.

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Szabó, Dániel. "Linear elastic finite element investigation of titanium specimen produced by Additive Manufacturing." International Journal of Engineering and Management Sciences 4, no. 4 (September 9, 2019): 85–91. http://dx.doi.org/10.21791/ijems.2019.4.9.

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Nowadays orthopaedic implants are mainly fabricated from solid material (titanium alloy). The mechanical properties of these implants are much stronger than human bone tissue’s properties, and this leads to fixation problems and a short lifetime, but today these problems can be eliminated with the usage of metal additive manufacturing. The mechanical properties of the implants can be influenced on demand with the variation of the material structure using different sizes and types of unit cells for building up its structure.

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Dudek, Agata, and Renata Włodarczyk. "Composite 316L+Al₂O₃ for Application in Medicine." Materials Science Forum 706-709 (January 2012): 643–48. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.643.

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The demand for new materials in medicine is on the increase today. Long-lasting implants (joint prostheses, dentistry implants), made typically of metals and their alloys, are characterized with high mechanical properties, however their corrosion resistance and biocompatibility are relatively low. One of the methods to ensure particular functional properties is to employ composite implants, combining improved mechanical properties of metallic material with biocompatibility of ceramic materials. The study aimed to develop and analyse properties of metallic/ceramic composites made of the mixture of powders: austenitic steel (316LHD) and ceramics (Al2O3).

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Almotairy, Saud M., Nabeel H. Alharthi, and Hany S. Abdo. "Regulating Mechanical Properties of Al/SiC by Utilizing Different Ball Milling Speeds." Crystals 10, no. 4 (April 23, 2020): 332. http://dx.doi.org/10.3390/cryst10040332.

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Advanced materials with high strength are in great demand for structural applications, such as in aerospace. It has been proved that fabrication strategy plays a vital role in producing composites to satisfy these needs. This study explores new strategies for flake powder metallurgy, with the aim of designing an effective strategy to achieve the highest possible mechanical strength for a metal matrix nanocomposite without changing the reinforcement fraction. Different strategies were used to regulate the mechanical properties for similar composites based on shift speed ball milling. Ultra-ductile composites on one hand, and ultra-strong composites on the other hand, were fabricated using similar composites. The results demonstrate that shifting the ball milling speed can be used to manipulate the mechanical properties of the composite to achieve the desired properties for any specific application.

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Vakil, Anand Utpal, Maryam Ramezani, and Mary Beth B. Monroe. "Magnetically Actuated Shape Memory Polymers for On-Demand Drug Delivery." Materials 15, no. 20 (October 18, 2022): 7279. http://dx.doi.org/10.3390/ma15207279.

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Repeated use of intravenous infusions to deliver drugs can cause nerve damage, pain, and infection. There is an unmet need for a drug delivery method that administers drugs on demand for prolonged use. Here, we developed magnetically responsive shape memory polymers (SMPs) to enhance control over drug release. Iron oxide magnetic nanoparticles (mnps) were synthesized and incorporated into previously developed SMPs to enable magnetically induced shape memory effects that can be activated remotely via the application of an alternating magnetic field. These materials were tested for their shape memory properties (dynamic mechanical analysis), cytocompatibility (3T3 fibroblast viability), and tunable drug delivery rates (UV–VIS to evaluate the release of incorporated doxorubicin, 6-mercaptopurine, and/or rhodamine). All polymer composites had >75% cytocompatibility over 72 h. Altering the polymer chemistry and mnp content provided methods to tune drug release. Namely, linear polymers with higher mnp content had faster drug release. Highly cross-linked polymer networks with lower mnp content slowed drug release. Shape memory properties and polymer/drug interactions provided additional variables to tune drug delivery rates. Polymers that were fixed in a strained secondary shape had a slower release rate compared with unstrained polymers, and hydrophobic drugs were released more slowly than hydrophilic drugs. Using these design principles, a single material with gradient chemistry and dual drug loading was synthesized, which provided a unique mechanism to deliver two drugs from a single scaffold with distinct delivery profiles. This system could be employed in future work to provide controlled release of selected drug combinations with enhanced control over release as compared with previous approaches.

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Liu, Chuanxin, Bangchao Liang, Yangguang Zhao, and Xiaoxiao Han. "Effects of Hot-Melt-Extrusion process parameters on the Feedability of Fused Deposition Modeling filaments." Journal of Physics: Conference Series 2355, no. 1 (October 1, 2022): 012017. http://dx.doi.org/10.1088/1742-6596/2355/1/012017.

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Abstract Fused deposition modelling (FDM) has shown its advantages in the field of personalized oral medicine due to its low cost, simplicity and flexible manufacturing for on- demand doses. However, most pharmaceutical-grade polymers that can be hot-melt extruded do not have the mechanical properties for high-quality FDM feedstock, and it is considered a barrier to further development of FDM pharmaceutical applications. In this paper, the impacts of Hot- Melt Extrusion (HME) process parameters on the mechanical properties of FDM filaments is explored for the brittle polymer polyvinylpyrrolidone (PVP). The results show that the feed rate greatly influences the mechanical properties of the filaments. Through the exploration of HME process parameters, the preparation method of FDM raw filaments has been further improved, and the application of brittle polymers in FDM pharmaceuticals has been broadened.

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Lotz, Steffen, Emad Scharifi, Ursula Weidig, and Kurt Steinhoff. "Effect of Combined Forming and Aging Processes on the Mechanical Properties of the Precipitation-Hardenable High-Strength Aluminum Alloys AA6082 and AA7075." Metals 12, no. 8 (July 25, 2022): 1250. http://dx.doi.org/10.3390/met12081250.

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The recently increasing demand for hot stamped aluminum components in the automotive and aerospace industries explains the necessity of designing efficient and resource-conserving thermo-mechanical processes. Within the thermo-mechanical process, the simultaneous effect of deformation and temperature accelerate the precipitation kinetics. Therefore, this study focuses on the combined effect of forming and aging processes on the mechanical properties of high-strength aluminum alloys AA6082 and AA7075. For this aim, two different thermo-mechanical aging process strategies after solution heat treatment and quenching in a water-dilutable polymer quenchant are proposed. The superpositioning of the forming step is either performed at the beginning or continuously during the aging treatment. The resulting mechanical properties are characterized using tensile tests. With increasing the plastic elongation, there is an increase in yield and tensile strength, which is accompanied by a significant decrease in strain after failure. Both thermo-mechanical aging strategies reveal mechanical properties similar to the conventional T6 peak aged condition with a significant reduction in process time from 24 h to 5 h.

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Wang, Xiuya, Ke Wan, Pengbo Xie, Yuanyuan Miao, and Zhenbo Liu. "Ultralight, High Capacitance, Mechanically Strong Graphene-Cellulose Aerogels." Molecules 26, no. 16 (August 12, 2021): 4891. http://dx.doi.org/10.3390/molecules26164891.

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With increasing energy demand driving the need for eco-friendly and efficient energy storage technology, supercapacitors are becoming increasingly prevalent in wearable devices because of their portability and stability. The performance of these supercapacitors is highly dependent on the choice of electrode material. The high capacitance and mechanical properties needed for these materials can be achieved by combining graphene’s stable electrical properties with renewable cellulose’s excellent mechanical properties into porous aerogels. In this study, graphene-cellulose hydrogels were prepared by a one-step hydrothermal method, with porous, ultra-light, and mechanically strong graphene-cellulose aerogels then prepared by freeze-drying. These composite aerogels possess excellent mechanical strength and high specific capacitance, capable of bearing about 1095 times the pressure of their own weight. Electrochemical tests show the specific capacitance of these composite aerogels can reach 202 F/g at a scanning rate of 5 mA/cm2. In view of their high surface area and fast charge transport provided by their 3D porous structure, graphene-cellulose aerogels have great potential as sustainable supercapacitor electrodes.

Journal articles on the topic 'On-Demand mechanical properties'

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